JP2011106967A - Apparatus and method for measuring size and weight - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a size/weight measuring apparatus for measuring the size and weight of freight in conveyance with high accuracy. <P>SOLUTION: The apparatus for measuring the size and weight of freight A moving on a conveyance route includes: an optical gate 50 including a plurality of light receiving sensors arranged in a direction orthogonal to a conveying direction to receive a parallel beam of light projected onto the freight A by the light receiving sensors, thereby detecting the position of a shaded photoreceptive sensor incapable of receiving light by being shaded from light by the freight A; a conveyance distance detection means 12 for detecting a conveyance distance of the freight A; a memory for therein storing the position of the shaded photoreceptive sensor of the optical gate 50 each time the conveyance distance increases by a prescribed amount while repeating this operation until the freight A passes through the optical gate 50; a size measuring means for calculating the size of the freight A based on data stored in the memory after the freight A passes through the optical gate 50; and a weight measuring means for measuring the weight of the freight moving on the conveyance route. The apparatus highly precisely measures the size and weight of the freight A without being affected by the conveying speed of the freight A. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a dimensional weight measuring apparatus that measures the length and width of a cargo being conveyed by a conveying means such as a conveyor together with the weight of the cargo, and a dimensional weight measuring method thereof. The dimensions can be measured with high accuracy.

In the logistics industry that handles cargo of various sizes, traditionally, weighing and dimensional measuring devices are arranged in the cargo sorting line to measure the weight and volume of cargo moving on the line, and based on the measurement results A system to sort cargo is introduced.
The following Patent Document 1 describes an example of a dimension measuring device used in such a system. As shown in FIG. 8, many of this type of apparatus measures the dimensions of the cargo A conveyed by the driving roller 1 or the conveyor in a non-contact manner using optical means.

The apparatus shown in FIG. 8 has, as optical means, a projector 4a having a large number of light emitting elements and a light receiver 4b having a large number of light receiving elements, and the light emitting elements are orthogonal to the conveying direction of the cargo A. The light receiving elements are arranged at positions that receive light from the light emitting elements.
When the cargo A passes between the projector 4a and the light receiver 4b, a light receiving element (that is, a light shielding light receiving element) that cannot receive the light is generated because the light from the light emitting element is blocked. If the generation position and generation number of this light-shielding light receiving element, the generation time t ₀ and the end time t ₁ are detected, v and (t ₁ −t ₀ ) are multiplied when the transport speed v of the cargo A is constant. The dimension of the cargo A in the transport direction can be obtained, and the dimension of the cargo A in the direction orthogonal to the transport direction can be obtained by multiplying the pitch of the light receiving elements and the number of the light-shielding light receiving elements.

JP-A-6-50721

However, in a system in which a dimension measuring device is incorporated in the line, the cargo sent from the dimension measuring device after finishing the dimension measurement is congested on the downstream line. Therefore, the conveyance speed of the dimension measuring device is delayed or temporarily stopped. Often occurs. If such a change in the conveyance speed occurs during the measurement of the size of the cargo, an error occurs in the size of the cargo in the conveyance direction.
In the logistics field, the shipping fee may be determined by the weight per unit volume. In such cases, measuring the size and weight of the cargo with separate devices can be costly and provide a large space for cargo transportation. It becomes a big problem when the size and weight data of each cargo shifts.

  The present invention was devised in view of such circumstances, and can measure the size and weight of the cargo at the same time, and can measure the size of the cargo accurately even when the conveyance speed of the cargo fluctuates during measurement. It is an object of the present invention to provide a weight measuring device and to provide a dimensional weight measuring method thereof.

  The present invention is a dimensional weight measuring device for measuring the size and weight of a cargo moving on a conveyance path, wherein a plurality of light receiving sensors are arranged in an orthogonal direction orthogonal to the cargo conveyance direction, and An optical gate that detects a parallel light beam projected on the cargo by the light receiving sensor and detects a position of the light shielding light receiving sensor that is shielded by the cargo and cannot be received, and a transport distance detection that detects a transport distance of the cargo on the transport path Each time the transport distance increases by a predetermined amount, the position of the light-shielding light receiving sensor of the optical gate is stored in association with the transport distance, and this operation is repeated until the cargo passes through the optical gate. And a dimension measuring means for calculating a dimension of the cargo based on a position of the light-shielding light-receiving sensor stored in the storage means after the cargo has passed through the optical gate. A weight measuring means for measuring the weight of the cargo that moves the transport path, characterized in that it comprises a.

  Each time the cargo moves a predetermined amount (for example, 5 mm) on the conveyance path, the dimension weight measuring apparatus checks the light shielding light receiving sensor of the optical gate and sequentially stores the position of the light shielding light receiving sensor. Therefore, the size of the cargo in the direction orthogonal to the transport direction is detected at intervals of 5 mm by the optical gate. This interval is kept constant even if the cargo moving speed is slow or the cargo is stopped, so that the size of the cargo can be measured without being influenced by the conveying speed. Even when the surface of a cubic or rectangular parallelepiped cargo is transported without being orthogonal to the transport direction, the original dimensions of the cargo can be easily obtained from the data stored in the storage means. Further, even if the cargo has an unusual shape that does not belong to a cube or a rectangular parallelepiped, the shape of the cargo and the dimensions in the desired direction can be easily obtained from the data stored in the storage means. Since the weight measurement is not affected by the conveyance speed, this apparatus can measure the size and weight of the cargo with high accuracy even when the cargo conveyance speed fluctuates.

Further, the optical gate of the dimensional weight measuring apparatus of the present invention includes a plurality of horizontal light receiving sensors arranged in a direction parallel to the surface of the transport path and a plurality of sensors arranged in a direction perpendicular to the surface of the transport path. A vertical light receiving sensor, and a parallel light flux in a direction perpendicular to the surface of the transport path is projected toward the horizontal light receiving sensor, and a direction parallel to the surface of the transport path toward the vertical light receiving sensor. It is desirable that the parallel light beam be projected.
In this way, the vertical, horizontal and height dimensions of the cargo can be measured.

Further, the transport path of the dimensional weight measuring apparatus of the present invention comprises a first conveyor that is a transport means of a first conveyor scale and a second conveyor that is a transport means of a second conveyor scale, It is desirable that the optical gate is arranged between the first conveyor and the second conveyor.
In this device, the dimensions of the cargo are measured while the cargo moves on the conveyance path, and the cargo is weighed by the first conveyor scale and / or the second conveyor in parallel. .

In addition, the dimensional weight measuring apparatus of the present invention includes a rotary encoder that detects a rotation angle of a driving roller for driving the first conveyor or the second conveyor as the transport distance detecting means.
If the rotation angle of the driving roller is detected, the moving distance of the conveyor can be obtained from the rotation angle and the radius of the driving roller.

Further, the dimensional weight measuring apparatus of the present invention can select a forward direction or a reverse direction as a transport direction of the cargo, and when the cargo is transported in either the forward direction or the reverse direction, Measure the weight.
This device can also be used in a logistics field where the cargo transport direction is reversed depending on the time of day.

In addition, the dimensional weight measuring apparatus according to the present invention may be configured such that the cargo that has passed through the optical gate is transported to the side carried into the transport path by reversing the transport direction of the transport path.
This device can measure the size and weight of the cargo in a small work area.

Further, the dimensional weight measuring apparatus of the present invention may further include a monitor, and display an image of the cargo created based on the position of the light-shielding light-receiving sensor stored in the storage means on the monitor.
By using the data stored in the storage means, it is possible to display on the monitor an accurate image of the cargo that is not influenced by the cargo transportation speed.

  The present invention is also a dimensional weight measuring method for measuring dimensions and weight of a cargo moving on a conveyance path, wherein a plurality of light receiving sensors are arranged in the orthogonal direction perpendicular to the cargo conveyance direction in the middle of the conveyance path. An optical gate that detects the position of a light-blocking light-receiving sensor that receives a parallel light beam projected onto the cargo from the orthogonal direction with the light-receiving sensor and is shielded by the cargo and cannot receive the light is installed. Each time the transport distance increases by a predetermined amount while measuring the weight of the moving cargo and detecting the transport distance on the transport path of the cargo, the light-shielding light receiving sensor of the optical gate is associated with the transport distance. Is stored in the storage means, and this operation is repeated until the cargo passes through the optical gate. After the cargo passes through the optical gate, the operation is stored in the storage means. Serial and calculates the size of the cargo on the basis of the position of the light shielding light receiving sensor.

  By this dimensional weight measurement method, the size and weight of the cargo can be measured without being affected by the change in the cargo transportation speed. Even when the surface of a cubic or rectangular parallelepiped cargo is transported without being orthogonal to the transport direction, the vertical, horizontal, or height dimensions of the cargo can be easily obtained from the data stored in the storage means. it can. Further, even if the cargo has an unusual shape that does not belong to a cube or a rectangular parallelepiped, the shape of the cargo and the dimensions in the desired direction can be easily obtained from the data stored in the storage means.

According to the present invention, the size and weight of a cargo can be measured with high accuracy even when the cargo transportation speed fluctuates.
In addition, regardless of the orientation of a cube-shaped or rectangular parallelepiped-shaped cargo, the vertical, horizontal, or height dimensions of the cargo can be easily obtained with high accuracy.
Moreover, even when the shape of the cargo does not belong to a cube or a rectangular parallelepiped, the shape can be accurately grasped, and the dimension in the desired direction of the cargo can be easily obtained with high accuracy.

The figure which shows the whole shape of the dimensional weight measuring apparatus which concerns on embodiment of this invention. The side view which shows the principal part of the apparatus of FIG. 1 shows an optical gate of the apparatus of FIG. Block diagram showing the control mechanism of the apparatus of FIG. Flow chart showing the operation of the dimension measuring unit shown in FIG. The figure which shows the data stored in the memory shown in FIG. 4 typically Other figures which show typically the data stored in the memory shown in FIG. Diagram showing a conventional dimension measuring device

As shown in FIGS. 1 and 2, the dimensional weight measuring apparatus according to the embodiment of the present invention incorporates a dimensional measuring mechanism in a multiple scale for measuring the load of a moving cargo A.
As described in Japanese Patent No. 3249005, the multiple scale has a first conveyor scale and a second conveyor scale arranged in series adjacent to each other. The 1st conveyor 10 shown in FIG. 2 is a conveyance means of the 1st conveyor scale, and the 2nd conveyor 20 is a conveyance means of the 2nd conveyor scale.

The dimension measuring mechanism uses the first conveyor 10 and the second conveyor 20 as a means for transporting cargo A. As shown in FIG. 2, the cargo A transported from the upstream conveyor 30 is transported by the first conveyor 10 and the second conveyor 20, and is sent from the second conveyor 20 to the downstream conveyor 40.
The dimensional weight measuring apparatus further includes an optical gate 50 disposed between the first conveyor 10 and the second conveyor 20, a control mechanism 60, and a monitor 70 that displays the shape of the cargo A.

The cargo A passes through the optical gate 50 when transferring from the first conveyor 10 to the second conveyor 20. This optical gate 50 has a frame that stands upright perpendicular to the conveying direction of the conveyors 10 and 20, and as shown in FIG. 3, the upper frame 51 parallel to the surface of the conveyors 10 and 20 has a large number of frames. The light emitting elements are arranged at a constant pitch ΔL (for example, 5 mm), and a large number of light receiving elements are arranged at a pitch of ΔL in the lower frame 52 facing the upper frame 51. Here, a large number of light receiving elements of the lower frame 52 are represented by h ₁ to h ₂₀ .
In addition, a large number of light emitting elements are arranged at a pitch of ΔL in the right frame 53 perpendicular to the surfaces of the conveyors 10 and 20, and a large number of light receiving elements are received in the left frame 54 facing the right frame 53. The elements are arranged at a pitch of ΔL. Here, a large number of light receiving elements of the left frame 54 are represented by p ₁ to p ₂₀ .

Each light emitting element of the upper frame 51 emits light perpendicular to the surfaces of the conveyors 10 and 20, and the parallel light beams emitted from the plurality of light emitting elements emit the lower frame 52 when there is no cargo A to be shielded. The light receiving elements h _{1 to} h ₂₀ receive the light. When there is a cargo A to be shielded from light, the light receiving elements (h _{5 to} h ₁₆ in FIG. 3) at the light shielded positions cannot receive light and become light shielding light receiving elements.
Each light emitting element of the right frame 53 emits light parallel to the surfaces of the conveyors 10 and 20, and the parallel luminous flux emitted from the plurality of light emitting elements is left when the cargo A to be shielded does not exist. Light is received by the light receiving elements p _{1 to} p ₂₀ of the frame body 54. When there is a cargo A to be shielded from light, the light receiving elements (p _{1 to} p ₇ in FIG. 3) at the light shielded positions cannot receive light and become light shielding light receiving elements.

Accordingly, the maximum width of the cargo A at the position of the optical gate 50 is obtained with the resolution of the pitch (ΔL) of the light receiving elements by detecting the light shielding light receiving elements from the light receiving elements h _{1 to} h ₂₀ of the lower frame 52. The maximum height of the cargo A at the position of the optical gate 50 can be determined by detecting the light-shielding light-receiving element from the light-receiving elements p _{1 to} p ₂₀ of the left frame 54, and the light-receiving element pitch (ΔL) The resolution can be obtained.

The 1st conveyor 10 and the 2nd conveyor 20 are controlled by the conveyor drive part mentioned later so that a conveyance speed may become the same. In order to detect the conveyance speeds of the first conveyor 10 and the second conveyor 20, a rotary encoder 12 that detects the rotation angle of the driving roller 11 that drives the first conveyor 10 is provided. As will be described later, the rotary encoder 12 is used to detect the transport distance of the first conveyor 10 and the second conveyor 20.
In addition, transmission type photoelectric switches PH ₀ , PH ₂ , and PH ₃ for detecting the passage of the cargo A are installed at the entrance position of the first conveyor 10, the vicinity of the exit, and the exit position of the second conveyor 20. Yes.

  As shown in FIG. 4, the control mechanism 60 uses a first conveyor scale and a second conveyor scale to measure the load of the cargo A transported by the first conveyor 10 and the second conveyor 20. 63, a dimension measuring unit 64 that measures the dimension of the cargo A using the detection result of the optical gate 50, a conveyor driving unit 65 that controls the transport speed of the first conveyor 10 and the second conveyor 20, and a monitor 70 Are provided with a display unit 66 for controlling display, a memory 62 used as a work area for dimension measurement, and a control unit 61 for controlling the whole.

  When the conveyor driving unit 65 controls the first conveyor 10 and the second conveyor 20 to have the same conveying speed, and acquires information on the occurrence of cargo congestion on the downstream conveyor 40, The conveyor 10 and the second conveyor 20 are controlled to delay or stop the conveyance speed.

Based on the detection information of the transmission photoelectric switches PH ₀ , PH ₂ , and PH ₃ , the weighing unit 63 determines that the conveyed cargo A is singly between the transmission photoelectric switches PH ₀ and PH _{2 of} the first conveyor 10. When the loaded state is detected, the load of the cargo A is measured by the first conveyor scale, and the cargo A that has been loaded on the first conveyor 10 together with the other cargo is transferred to the second conveyor. When the state of being carried alone on 20 is detected, the load of the cargo A is measured by the second conveyor scale. Further, when it is detected that the conveyed cargo A is placed on the first conveyor 10 and the second conveyor 20, the measured value of the first conveyor scale and the measured value of the second conveyor scale. And the load of cargo A is calculated.

When the weighing unit 63 detects the load of the cargo A, the dimension measuring unit 64 performs the operation shown in the flowchart of FIG. 5 in parallel.
It transported cargo A and reaches the position of the transmission type photoelectric switch PH ₂ (Step 1), to start checking shielding the light receiving element of the optical gate 50 (step 2). The transport distance of the first conveyor 10 and the second conveyor 20 is calculated using the rotation angle of the drive roller 11 detected by the rotary encoder 12 and the radius of the drive roller 11, and the transport distance is a fixed amount Δd (for example, 5 mm). ) Increase (Yes in Step 3), it is checked whether or not there is a light-shielding light receiving element among the light receiving elements of the optical gate 50 (Step 4). Repeat this process until the light shielding light receiving element is detected, the light blocking light receiving element is detected, it stores the position of the light shielding light receiving element, in association with the transport distance from the position of the transmission type photoelectric switch PH ₂ in the memory 62 (Step 5).

Further, each time the transport distance increases by a certain amount Δd (step 6), the presence / absence of the light-shielding light-receiving element is checked (step 7). The data is stored in the memory 62 in association with the transport distance from the position of the photoelectric switch PH ₂ (step 8).
Steps 6 to 8 are repeated until there is no light-blocking light-receiving element. If the light-blocking light-receiving element becomes zero (No in Step 7), the light-blocking light-receiving element check process is terminated (Step 9).

6 and 7 schematically show data stored in the memory 62 at this time. The horizontal axis of FIG. 6 and 7 the transport distance from the position of the transmission type photoelectric switch PH ₂ illustrates a multiple of [Delta] d. 6 indicates the positions of the light receiving elements h _{1 to} h ₂₀ of the lower frame 52, and the black circles in the figure indicate the positions of the light shielding light receiving elements. The vertical axis in FIG. 7 indicates the positions of the light receiving elements p _{1 to} p ₂₀ of the left frame 54, and the black circles in the figure indicate the positions of the light shielding light receiving elements.
The dimension measuring unit 64 reads the pattern represented by the black circles in FIG. 6 from the data stored in the memory 62, calculates the vertical and horizontal dimensions of the cargo A developed in the plan view, and the black circles in FIG. The represented pattern is read out, and the height dimension of the cargo A is calculated (step 10).

6 and 7, the horizontal scale interval Δd is constant regardless of the conveyance speed of the first conveyor 10 and the second conveyor 20, and the vertical scale interval is the arrangement pitch of the light receiving elements. ΔL, which is also constant regardless of the conveyance speed of the first conveyor 10 and the second conveyor 20.
Therefore, the pattern represented by the black circle is not affected by the conveyance speed of the first conveyor 10 and the second conveyor 20.
Therefore, the dimension of the cargo A can be calculated with high accuracy from this pattern with the accuracy of Δd and ΔL as resolution. If Δd and ΔL are set small, the accuracy of dimensional measurement is further improved.

As the dimensions of the side of the cargo A, a square having the minimum area surrounding the black dot data is calculated from the black circle pattern of FIG. 6, and the dimensions of the two sides of the square are adopted as the dimensions of the side of the cargo A.
Thus, by calculating the dimensions from the black circle pattern, it is possible to determine the dimensions of a cargo with complicated protrusions and dents, a flat and round cargo such as a tire with high accuracy.

The display unit 66 reads the black circle pattern data from the memory 62, creates image data of the cargo A from this data, and displays it on the monitor 70 (step 11).
Therefore, a high-accuracy image of the cargo A that is not affected by the conveyance speeds of the first conveyor 10 and the second conveyor 20 is displayed on the monitor 70.

  In this way, the dimension weight measuring apparatus can measure the size of the cargo in parallel with the weighing of the cargo. A system that measures the size and weight of cargo with separate devices is costly, requires a lot of space for the conveyor, and is a big problem when the size and weight data of each cargo is shifted. However, such a problem can be solved by this dimensional weight measuring apparatus capable of simultaneously measuring the size and weight of the cargo.

  In addition, this device, which measures the size and weight simultaneously, can check for errors in weight measurement when two cargoes are transported side by side on a conveyor (separated in a direction perpendicular to the transport direction). . That is, when two cargoes have been transported at the same time in the direction perpendicular to the transport direction (when two cargos are seen from the top of the conveyor but appear to be one cargo when viewed from the side), each If there is no contact between the two cargoes, the dimensions of each cargo can be measured, but since the two cargoes are placed on the same balance conveyor at the same time, only the total weight of the two cargoes can be measured. The weight of can not be measured. Therefore, the weight measurement value at this time must be an error. Such error checking is made possible by measuring dimensions and weight simultaneously.

Moreover, even if the conveyance speed of the conveyors 10 and 20 fluctuates during the dimension measurement, the dimension / weight measuring apparatus can determine the dimension of the cargo with high accuracy without being affected by the fluctuation. Since the weight measurement of the cargo being transported is not affected by the transport speed, this apparatus can measure the size and weight of the cargo with high accuracy even when the cargo transport speed fluctuates.
In addition, regardless of the orientation of a cube-shaped or rectangular parallelepiped-shaped cargo, the vertical, horizontal, or height dimensions of the cargo can be easily obtained with high accuracy.
Further, the image of the cargo A can be displayed on the monitor 70 with high accuracy.
Further, as is apparent from FIGS. 6 and 7, even if the cargo has an irregular shape other than a cube or a rectangular parallelepiped, the shape is accurately represented by a black circle pattern. And the dimension of the desired direction of cargo can be easily calculated | required with high precision from this black circle pattern.

In addition, when the downstream conveyor 40 is adjacent to the second conveyor 20, the cargo A for which the measurement of the load and the dimension has been completed is sent from the second conveyor 20 to the downstream conveyor 40. On the other hand, when the downstream conveyor 40 is not adjacent to the second conveyor 20, the conveyor driving unit 65 moves the first conveyor 10 and the second conveyor when the transmission photoelectric switch PH ₃ detects the cargo A. The conveyance direction of the conveyor 20 is reversed. Therefore, the cargo A is sent from the first conveyor 10 to the upstream conveyor 30.
In this way, by returning the cargo whose load and dimensions have been measured to the direction in which the cargo was carried in, measurement in a narrow place becomes possible.

Further, in the distribution site, there are cases where the transfer direction of the cargo is changed according to the time zone (for example, the transfer direction is reversed between morning and afternoon). By changing the conveying direction of the conveyor 20, it is possible to cope with such usage. In this case, in FIG. 2, the transport directions of the first conveyor 10 and the second conveyor 20 are reversed, and the second conveyor 20 sends the cargo A sent from the conveyor 40 to the first conveyor 10. Sometimes the dimensions of cargo A passing through the optical gate 50 are measured. Further, the weight of the cargo A is measured in a state where the cargo A is placed on the first conveyor 10, the second conveyor 20, or both of them. The first conveyor 10 sends the cargo A whose dimensions and weight have been measured to the conveyor 30.
The dimension measurement procedure during reverse conveyance is the same as the dimension measurement procedure during forward conveyance except that the transmission start point is detected using the transmission photoelectric switch PH ₃ instead of the transmission photoelectric switch PH ₂ (see FIG. Same as 5).
Incidentally, for the size measurement of the reverse conveyance, and add a new transmission type photoelectric switch corresponding to the transmission type photoelectric switch PH ₂ in the second conveyor 20 side of the optical gate 50, the reverse conveyance using it The scan start time may be detected.

The configuration shown here is an example, and the present invention is not limited thereto.
Here, although the example which combined the dimension measurement mechanism with the multiple scale was shown, you may combine a single conveyor scale and a dimension measurement mechanism. In addition, here, a conveyor is used as the cargo conveying means. However, as described in Patent Document 1, a conveying means in which a large number of drive rollers are arranged in parallel may be used.
Here, the rotary encoder 12 is used to detect the transport distance of the transport means, but the transport distance of the transport means may be detected by other means. Here, the light receiving elements are arranged in the lower frame body 52 and the left frame body 54 of the optical gate 50. However, the light receiving elements may be arranged in only one of them, or the vertical and horizontal positions of the arrangement. The relationship may be reversed.
Further, the object to be measured to be measured by the dimensional weight measuring device may be any shape or size.

  The dimensional weight measuring apparatus of the present invention is capable of high-accuracy dimensional measurement and weight measurement, and requires dimensional measurement and weight measurement for industrial products, agricultural products, fruits and vegetables, as well as distribution and distribution fields. It can be widely used in various fields that handle articles.

A cargo 4a projector 4b light receiver 10 first conveyor 11 drive roller 12 rotary encoder 20 second conveyor 50 optical gate 51 upper frame body 52 lower frame body 53 right frame body 54 left frame body 60 control mechanism 61 control unit 62 light-receiving element PH memory 63 metering portion 64 the dimensions of the measuring unit 65 conveyor drive unit 66 display unit 70 monitor h ₁ to h ₂₀ lower frame receiving element p ₁ ~p ₂₀ left frame _0, PH _1, PH ₃ permeable Type photoelectric switch

Claims (8)

A dimensional weight measuring device for measuring the size and weight of cargo moving on a conveyance path,
A light-blocking light-receiving sensor in which a plurality of light-receiving sensors are arranged in an orthogonal direction orthogonal to the cargo conveyance direction, and a parallel light beam projected onto the cargo from the orthogonal direction is received by the light-receiving sensor and is blocked by the cargo and cannot be received An optical gate for detecting the position of
A transport distance detecting means for detecting a transport distance on the transport path of the cargo;
Storage means for storing the position of the light-shielding light receiving sensor of the optical gate in association with the transport distance each time the transport distance increases by a predetermined amount, and repeating this operation until the cargo passes through the optical gate;
Dimension measuring means for calculating the dimensions of the cargo based on the position of the light-shielding light-receiving sensor stored in the storage means after the cargo has passed through the optical gate;
A weight measuring means for measuring the weight of the cargo moving on the conveyance path;
A dimensional weight measuring apparatus comprising:   The dimensional weight measuring apparatus according to claim 1, wherein the optical gate has a plurality of horizontal light receiving sensors arranged in a direction parallel to the surface of the transport path, and a direction perpendicular to the surface of the transport path. A plurality of vertical light receiving sensors arranged, the parallel light flux in a direction perpendicular to the surface of the transport path is projected toward the horizontal light receiving sensor, and the transport path of the transport path is directed toward the vertical light receiving sensor. A dimensional weight measuring apparatus, wherein the parallel light flux in a direction parallel to a surface is projected.   3. The dimensional weight measuring apparatus according to claim 1, wherein the transport path is a first conveyor that is a transport means for a first conveyor scale, and a second conveyor that is a transport means for a second conveyor scale. A dimensional weight measuring apparatus comprising: a conveyor, wherein the optical gate is disposed between the first conveyor and the second conveyor.   4. The dimensional weight measuring apparatus according to claim 3, wherein the transport distance detecting means includes a rotary encoder that detects a rotation angle of a driving roller that drives the first conveyor or the second conveyor. Dimensional weight measuring device.   5. The dimensional weight measuring apparatus according to claim 1, wherein a forward direction or a reverse direction can be selected as a transport direction of the cargo, and the cargo is transported in either the forward direction or the reverse direction. Even in this case, a dimensional weight measuring apparatus for measuring the size and weight of the cargo.   6. The dimensional weight measuring apparatus according to claim 1, wherein the cargo that has passed through the optical gate reverses the transport direction of the transport path and is transported to a side that is transported into the transport path. Dimensional weight measuring apparatus characterized by being made.   The dimensional weight measuring apparatus according to any one of claims 1 to 6, further comprising a monitor, wherein the cargo image created based on a position of the light-shielding light-receiving sensor stored in the storage means is the A dimensional weight measuring device displayed on a monitor. A dimension-weight measuring method for measuring dimensions and weight of cargo moving on a conveyance path,
A plurality of light receiving sensors are arranged in the orthogonal direction perpendicular to the cargo conveyance direction in the middle of the conveyance path, and the parallel light beam projected onto the cargo from the orthogonal direction is received by the light reception sensor and shielded by the cargo. Installed an optical gate that detects the position of the light-shielding light-receiving sensor that cannot receive light,
While measuring the weight of the cargo moving along the transport path,
While detecting the transport distance of the cargo on the transport path, each time the transport distance increases by a predetermined amount, the position of the light-shielding light receiving sensor of the optical gate is stored in the storage means in association with the transport distance, and this operation Until the cargo passes through the optical gate,
A dimension-weight measuring method, wherein after the cargo passes through the optical gate, the size of the cargo is calculated based on the position of the light-shielding light-receiving sensor stored in the storage means.